Configuring A Multicast Mac Address Entry; Configuring Dropping Unknown Multicast Packets - H3C S5600 SERIES Operation Manual

Configuring a Multicast MAC Address Entry

In Layer 2 multicast, the system can add multicast forwarding entries dynamically through a Layer 2
multicast protocol. Alternatively, you can statically bind a port to a multicast MAC address entry by
configuring a multicast MAC address entry manually.
Generally, when receiving a multicast packet for a multicast group not yet registered on the switch, the
switch will flood the packet within the VLAN to which the port belongs. You can configure a static
multicast MAC address entry to avoid this.
Follow these steps to configure a multicast MAC address entry in system view:
To do...
Enter system view
Create a multicast MAC
address entry
Follow these steps to configure a multicast MAC address entry in Ethernet port view:
To do...
Enter system view
Enter Ethernet port view
Create a multicast MAC
address entry.
If the multicast MAC address entry to be created already exists, the system gives you a prompt.
If you want to add a port to a multicast MAC address entry created through the mac-address
multicast command, you need to remove the entry first, create this entry again, and then add the
specified port to the forwarding ports of this entry.
You cannot configure a multicast MAC address starting with 01005e on S5600 series switches.
You cannot enable link aggregation on a port on which you have configured a multicast MAC
address, and you cannot configure a multicast MAC address on an aggregation port.

Configuring Dropping Unknown Multicast Packets

Generally, if the multicast address of the multicast packet received on the switch is not registered on the
local switch, the packet will be flooded in the VLAN which the multicast packet belongs to. When the
function of dropping unknown multicast packets is enabled, the switch will drop any multicast packets
whose multicast address is not registered. Thus, the bandwidth is saved and the processing efficiency
of the system is improved.
Use the command...
system-view
mac-address multicast
mac-address interface
interface-list vlan vlan-id
Use the command...
system-view
interface interface-type
interface-number
mac-address multicast
mac-address vlan vlan-id
2-4
Remarks
—
Required
The mac-address argument
must be a multicast MAC
address.
Remarks
—
—
Required
The mac-address argument
must be a multicast MAC
address.